Cost Reduction Programs and Other Charges - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges (benefit)	$ (4)	$ (8)
Cost reduction programs and other charges, after-tax and noncontrolling interest	1	28
Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges (benefit)	(8)	(52)
Other charges, merger related, net of tax	5	62
Gain triggered by a joint venture deconsolidation		52
Cost Reduction Program
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges (benefit)	4
Other restructuring costs	4	44
Cost reduction program charges, net of tax	4	34
Cost Reduction Program | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges (benefit)	4	26
Cost Reduction Program | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges (benefit)	$ 0	$ 18